MCP1643 _ BDTIC a Leading Distributor in China

MCP1643

MCP1643 is a compact, high-efficiency, fixed frequency, synchronous step-up LED driver with constant current, that operates from one and two-cell alkaline and NiMH/NiCd batteries. The device can also drive two red/green/yellow series connection LEDs.

Features

1.6A Typical Peak Input Current Limit
Up to 550 mA LED Load Current
Low Start-up Voltage: 0.65V (typical, 25 mA LED Current)
Low Operating Input Voltage: down to 0.5V
Maximum Input Voltage < VLED<5.0V
Maximum Output Voltage: 5.0V
Overvoltage Protection
Low Reference Voltage: VFB= 120 mV
Pulse-Width Modulation Mode Operation (1 MHz)
Internal Synchronous Rectifier
Internal Compensation
Inrush Current Limiting
Internal Soft-Start (240 µs typical)
Shutdown (EN = GND): True Load Disconnect
Dimming Control by Variable Duty Cycle
Shutdown Current: 1.2 µA (typical)
Overtemperature protection
Packages:MSOP-8, 2x3 DFN-8

Parameter

Parameter Name Value	Value
Regulator Type Step Up (Boost)	Step Up (Boost)
Input Voltage Range Min (V) 0.5	0.5
Input Voltage Range Max (V) 5	5
Output Voltage Range Min (V) 0.6	0.6
Output Voltage Range Max (V) 5	5
Quiescent Current (mA) typ 0.03	0.03
Switching Frequency (kHz) 1000	1000
Synchronous Rectifier Yes	Yes
Operating Temp Range -40 to 85	-40 to 85
Vfb (V) 0.12	0.12
Duty Cycle Max (%) 90	90
SHUTDOWN Current (µA) (Typ) 1.2	1.2
Switch current (A) typ 1.8	1.8
Automotive Qual Yes	Yes

Documents

MCP1643 Data Sheet	Data Sheets	08/20/2013	727KB
AN2041 - Battery-Powered Constant Current LED Drivers	AppNote	12/18/2015	435KB

Ordering Information

Part Number	Leads	Package Type	Temp Range	Packing	1+	26+	100+	1000+	5000+
MCP1643-I/MC	8	DFN	-40C to +85C	TUBE	0.98	0.82	0.74	0.72	0.71
MCP1643-I/MS	8	MSOP	-40C to +85C	TUBE	0.98	0.82	0.74	0.72	0.71
MCP1643T-I/MC	8	DFN	-40C to +85C	T/R	0.98	0.82	0.74	0.72	0.71
MCP1643T-I/MS	8	MSOP	-40C to +85C	T/R	0.98	0.82	0.74	0.72	0.71

RoHS Information

PartNumber	DeviceWeight	ShippingWeight	LeadCount	PackageType	PackageWidth	SolderComposition	JEDECIndicator
MCP1643-I/MS	0.025600	0.070000	8	MSOP	3x3mm	Matte Tin	e3
MCP1643T-I/MS	0.025600	0.215600	8	MSOP	3x3mm	Matte Tin	e3
MCP1643T-I/MSVAO	0.025600	0.215600	8	MSOP	3x3mm	Matte Tin	e3
MCP1643-I/MSVAO	0.025600	0.070000	8	MSOP	3x3mm	Matte Tin	e3
MCP1643T-I/MC	0.017000	0.130606	8	DFN	2x3x0.9mm	Matte Tin	e3
MCP1643-I/MC	0.017000	0.033333	8	DFN	2x3x0.9mm	Matte Tin	e3